Hex Calculator & Color
Convert hex to decimal, RGB color, ASCII codes, or perform hex arithmetic. Useful for programming and web color work.
Inputs
Decimal
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Binary
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Octal
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RGB color
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HSL color
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About Hex Calculator & Color
Web hex colors
#RRGGBB. Each pair is 0-255 brightness. #000000 black, #FFFFFF white, #FF0000 pure red. Modern CSS also supports #RRGGBBAA with alpha and shorthand #RGB.
When to use HSL
HSL (Hue, Saturation, Lightness) is more intuitive for designers — "more red" is just shifting Hue. RGB is what monitors actually output. Designers prototype in HSL, ship in RGB.
0x prefix
0x is a C/Java/JavaScript prefix for hex literals: 0xFF = 255. # is the CSS prefix for hex colors. They mean the same thing but contexts differ.